An examination of eye movements assesses normal function of the three cranial nerves and six muscles involved in eye movement.
If abnormal, it is important to consider both local and central problems, e.g.
Start by holding a pen torch approximately 30cm from the centre of the patients face and look for a symmetrical corneal light reflex, which indicates a central position of both eyes.
Trace either a rectangular box or an ‘H’ figure, moving the patients eyes to each corner.